Email Alerts
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loopback
In telephone systems, a loopback is a test signal sent to a network destination that is returned as received to the originator. The returned signal may help diagnose a problem. Definition
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network tracking tool (network device management program)
A network tracking tool, also called a network device management program, is a program that helps a network administrator keep track of moves, additions, and changes (known as MACs) to the hardware infrastructure of a network. Definition
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News briefs: Cisco security facelift; new WAN probe; bandwidth management
Cisco upgraded its Network Admission Control (NAC) appliance and rolled out two Adaptive Security appliance models. New WAN probe from Network Instruments provides historical analysis. Bandwidth-management tool introduced by Blue Coat. Article
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Monitoring bandwidth usage
What network monitoring software do you recommend for a medium-size business? I'd like to pinpoint users who are using excessive bandwidth for Internet surfing or peer-to-peer downloading. Ask the Expert
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Duplex mismatch: Why duplex conflicts plague the network, part 1
Duplex mismatch problems -- caused by two ends of the Ethernet attempting a full-duplex connection, resulting in packet loss -- simply will not go away. After a decade of plaguing IP networks, duplex conflicts still seem to be the single worst source... Tip
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Wireless LAN usage reporting: Tools for capacity planning
Usage reporting on wireless local area networks (WLANs) is becoming increasingly important as organizations rely more and more on wireless communication for mission-critical and real-time applications. In this tip, Robbie Harrell discusses WLAN usage... Tip
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Understanding bottlenecks and bandwidth utilization
Mysterious slowdowns, dropped connections and other anomalies have network managers frustrated. Take the mystery out of your performance issues with this insightful series by networking expert Carrie Higbie. Tip
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Reducing false positives in network monitoring
Network managers need to be aware of the importance of choosing the right tool to monitor their system's internal counters. In this tip, Brien Posey narrows in on alert mechanisms for Windows servers and helps you understand how to reduce false posit... Tip
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Making networks intelligent: The good, the bad and the symptomatic
It is clear that autonomics and self-healing will require specific details of the network, not symptomatic generalities, for any remedial or provisioning action to be reliably executed. Meanwhile, we wait and rely on a dwindling supply of smart, high... Tip
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OpenNMS, an introduction: Affordable network management
Open source expert Maria Winslow brings network managers up to speed about the free open source enterprise-grade network-management system OpenNMS. Tip
Network Management Strategies for the CIO